Abstract: A toner including toner particles containing a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent is a polymer A having a structure “a” represented by formula (1), and the polymer A has a weight average molecular weight (Mw) of 1,000 to 100,000: wherein R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, and g represents an integer of 1 to 3 and h represents an integer of 0 to 3, wherein when h is 2 or 3, R1 can be each independently selected.

Abstract: A toner including toner particles, each of which comprising a charging component, a polymer having a partial structure represented by the following formula (1) as the side chain, and a colorant: (R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; m represents an integer of 0 to 3; if m is 2 or 3, R1 can be each independently selected; n represents an integer of 1 to 3; and * represents a coupling site in the polymer.

Abstract: Provided is a toner having high charging rapidity to reach a sufficient charging amount in a short time, high stability of charging from the initial stage to a time when a large amount of sheets is printed out, and high stability of charging under a high temperature and high humidity. In a toner including toner particles, each of which contains at least a binder resin, a colorant, and a charge controlling resin, the charge controlling resin is a copolymer of a structure A having at least a specific salicylic acid derivative structure and a structure B having sulfonic acid or sulfonic acid ester as a substituent.

Abstract: To obtain a toner which has excellent charge rise and stability, tends to have a sharp charge distribution, has excellent pigment dispersion properties, exhibits no disarray in an image even during a high-speed copying operation, and can stably output high-resolution images. A toner comprising toner particle containing a binder resin, a colorant, resin PA, and resin PB, wherein the resin PA has unit A represented by Formula (1), the resin PB has unit B represented by Formula (2), a content “a” of the unit A in the toner particle is 2.00 ?mol/g or more, and a molar ratio b/a of the content “a” and a content “b” of the unit B in the toner particle is 0.10 or more and 10.00 or less.

Abstract: Since a charge amount of a toner and a charge rise characteristic thereof are liable to be influenced by the change in temperature and humidity condition, the change in image density occurs in printing, and in particular, in high temperature and high humidity environment, inconveniences, such as image fogging, occur due to non-uniformity of the charge amount distribution. In a toner including toner particles obtained by dispersing a monomer composition containing a polymerizable monomer and a colorant in an aqueous medium to form droplets and polymerizing the polymerizable monomer in the droplets, the toner particles contain a polymer formed by a polymerization reaction of the polymerizable monomer and a metal compound having a vinyl group.

Abstract: Provided is a toner having high charging rapidity to reach a sufficient charging amount in a short time, high stability of charging from the initial stage to a time when a large amount of sheets is printed out, and high stability of charging under a high temperature and high humidity. In a toner including toner particles, each of which contains at least a binder resin, a colorant, and a charge controlling resin, the charge controlling resin is a copolymer of a structure A having at least a specific salicylic acid derivative structure and a structure B having sulfonic acid or sulfonic acid ester as a substituent.

Abstract: A toner including toner particles, each of which comprising a charging component, a polymer having a partial structure represented by the following formula (1) as the side chain, and a colorant: (R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms; m represents an integer of 0 to 3; if m is 2 or 3, R1 can be each independently selected; n represents an integer of 1 to 3; and * represents a coupling site in the polymer.

Abstract: A toner including toner particles containing a binder resin, a colorant and a charge controlling agent, wherein the charge controlling agent is a polymer A having a structure “a” represented by formula (1), and the polymer A has a weight average molecular weight (Mw) of 1,000 to 100,000: wherein R1 represents a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, R2 represents a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atoms, or an alkoxyl group having 1 to 18 carbon atoms, and g represents an integer of 1 to 3 and h represents an integer of 0 to 3, wherein when h is 2 or 3, R1 can be each independently selected.

Abstract: A toner is provided which has toner particles containing a charging component and containing an aromatic compound represented by the following formula (1): wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R7 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R8 represents a hydrogen atom or a methyl group; and m represents an integer of 1 to 3.

Abstract: A toner is provided which has toner particles containing an aromatic compound represented by the following formula (1), and a colorant: wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R8 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); and m represents an integer of 1 to 3.

Abstract: An object of the present invention is to provide a toner in which a charging amount and rise of the charging amount are hardly influenced by change in a temperature and humidity environment, and pigment dispersibility is high in order to provide an image output having high transparency, color mixing properties, and color nuance stability.

Abstract: A resin for toner containing a resin component having both a polyester unit produced by polycondensation of a polyhydric alcohol component and a polycarboxylic acid component, and an aryl group having a sulfonic ester group as a substituent; and a toner that contains the resin for toner.

Abstract: A toner is provided which has toner particles containing a charging component and containing an aromatic compound represented by the following formula (1): wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R7 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R8 represents a hydrogen atom or a methyl group; and m represents an integer of 1 to 3.

Abstract: A toner is provided which has toner particles containing an aromatic compound represented by the following formula (1), and a colorant: wherein R1 to R3 each independently represent a hydrogen atom, a hydroxyl group, a carboxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); R4 to R8 each independently represent a hydrogen atom, a hydroxyl group, an alkyl group having 1 to 18 carbon atom(s) or an alkoxyl group having 1 to 18 carbon atom(s); and m represents an integer of 1 to 3.

Abstract: To obtain a resin for toners, or a toner, which is superior in the quickness in its rise of charging to a sufficient charge quantity in a short time, in the stability of charging that extends from the initial stage up to the printing on a large number of sheets, and in the stability of charging that comes in a high-temperature and high-humidity environment. As a charge control resin, it is characterized by containing a specific unit having sulfonic acid or a sulfonate as a substituent and a specific unit having a salicylic acid derivative.

Abstract: A resin for toner containing a resin component having both a polyester unit produced by polycondensation of a polyhydric alcohol component and a polycarboxylic acid component, and an aryl group having a sulfonic ester group as a substituent; and a toner that contains the resin for toner.

Abstract: A polymer is provided in which a sulfonic group or a derivative thereof is introduced. The polymer includes a unit represented by the following chemical formula (1): wherein R represents -A1-SO2R1; A1 is selected from an alkylene group, a heterocyclic ring, an aromatic ring; and —SO2R1 is a sulfonic group or of a derivative of a sulfonic acid.

Abstract: A charge controlling agent is provided as a compound in which an amide group is introduced together with a sulfonic group or a derivative thereof. The charge controlling agent is characterized by including at least one compound represented by the chemical formula (2) in which an amide group is introduced together with at least one of a sulfonic group, a sulfonic acid ester, a sulfonic acid salt, and a sulfonic acid halide.

Abstract: Provided are a novel polymer having a sulfonic group, a sulfonic acid ester group, or a derivative thereof incorporated therein, a method of producing the polymer, and a novel compound suitable for producing the polymer. A polymer is characterized by containing a unit represented by the following formula (1): wherein R1w and R1x are each independently a halogen atom or a hydrogen atom, R1y is a CH3 group or a hydrogen atom, and any one of R1a, R1b, and R1c is a sulfonate group represented by SO3R1f.

Abstract: To provide: a charge control agent having negative chargeability, which contributes to environmental conservation and the like to an increased degree, has high performance (high charge amount, quick rise-up of charge, excellent stability with time, and high environmental stability), and has improved dispersibility; a toner for developing an electrostatic charge image containing the charge control agent; and an image forming method and an image forming apparatus each using the toner for developing an electrostatic charge image. A charge control agent for controlling a charged state of powder, characterized by including one or more units each represented by the following chemical formula (1) in a molecule.